A gate valve apparatus includes a valve body to open and close a target object transfer port in a vacuum processing system. The user equipment comprises circuitry configured to process a user equipment identification by \xbd rate convolutionally encoding the UE ID to produce a code. In a preferred embodiment, said friction results in the rotation of the package around the longitudinal axis thereof, which is mounted on a rotative support, and the soft non abrasive element in contact with the surface thereof keeps motionless. The fan of the preferred embodiment also makes use of an annular ring joining the trailing edges of the blades.